Flopped a monster draw here, just wondering if I was right in going broke with it on the flop even to villain's 4-bet? I'm only in terrible shape versus the nut flush draw, which is probably only going broke against me with Ac plus 7c, 3c or 2c.

Which produces equity of 53.25% for villain's range and 46.75% for hero (Kc5c). I don't really know how to do the required equity calculations, but having invested 45.4% of my stack already to discover that I'm up against another monster, this seems to me like it has to be a call?

For 100BB we can't go broke here since we ain't gonna do it profitable in long run. Also we can't give him overpairs, why would we even? He limped. It's most likely aa strong made hand, I'd rather even be inclined to think sets only rather even some FDs. Even if we would put him on some FD:Board: 6
4
3 Equity Win TieUTG 38.15% 35.74% 2.41% { Kc5c }UTG+1 61.85% 59.44% 2.41% { 66, 44-33, 75s, Ac7c, Ac3c, Ac2c, 75o }

We are far-behind and ain't getting the equity for go broke. Which means we had rather to Call his raise than go broke.